static ApplicationUsageProxy DisplaySetting_e21(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_GL_CONTEXT_VERSION <major.minor>","Set the hint for the GL version to create contexts for.");

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static ApplicationUsageProxy DisplaySetting_e22(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_GL_CONTEXT_FLAGS <uint>","Set the hint for the GL context flags to use when creating contexts.");

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static ApplicationUsageProxy DisplaySetting_e23(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_GL_CONTEXT_PROFILE_MASK <uint>","Set the hint for the GL context profile mask to use when creating contexts.");